S42.311G vs S42.312G

S42.311G (Greenstick fracture of shaft of humerus, right arm, subsequent encounter for fracture with delayed healing) compared with S42.312G (Greenstick fracture of shaft of humerus, left arm, subsequent encounter for fracture with delayed healing), from the official CMS tabular data. S42.311G and S42.312G code the same condition on opposite sides. MedCoder-derived

Relationship

Review

Laterality relationship

S42.311G

Right

Greenstick fracture of shaft of humerus, right arm, subsequent encounter for fracture with delayed healing

↔

S42.312G

Left

Greenstick fracture of shaft of humerus, left arm, subsequent encounter for fracture with delayed healing

Same condition; these differ only in which side is documented.

These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.

Source: ICD-10-CM tabular list (laterality variant derived from the code title)

Can these codes be reported together?

Same condition, opposite side. S42.311G and S42.312G name the same condition on opposite sides of the body.

Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.

Side by side

	S42.311GGreenstick fracture of shaft of humerus, right arm, subsequent encounter for fracture with delayed healing	S42.312GGreenstick fracture of shaft of humerus, left arm, subsequent encounter for fracture with delayed healing
Billing status	Billable	Billable
Classification	S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)	S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
Definition	Greenstick fracture of shaft of humerus, right arm, subsequent encounter for fracture with delayed healing is a billable ICD-10-CM diagnosis code (S42.311G).	Greenstick fracture of shaft of humerus, left arm, subsequent encounter for fracture with delayed healing is a billable ICD-10-CM diagnosis code (S42.312G).
7th character	The appropriate 7th character is to be added to all codes in subcategory S42.31	The appropriate 7th character is to be added to all codes in subcategory S42.31
Includes	injuries of axilla injuries of scapular region	injuries of axilla injuries of scapular region

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources